Question about 2000 Jeep Grand Cherokee

2 Answers

Windows fogg up even with the defrost on

What would cause my front windsheild and front door windows fog up even with the defrost on high? If i roll down the windows briefly it temporarily defogs them but only for a short time.

Posted by on

  • yadayada
    yadayada May 11, 2010

    Your heater core is leaking hot steamy coolant into the air ducts, do u smell a weird kinda sweet smell?


2 Answers

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

You must turn on the A/C button while in defrost mode. The A/C acts as a dehumidifier rather than cooling the vehicle. Try works. FYI....The Air Conditioner has a duel use in this vehicle.

Posted on Dec 18, 2008

  • Level 1:

    An expert who has achieved level 1.


    An expert that hasĀ over 10 points.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 16 Answers

It could be you pollen filter that needs replacing, but check first that you haven't got your heater control on recurculation.

Posted on Dec 13, 2008

1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

Dodge durango 2001 fogging up windows not defrosting

It's most likely your heater core that is causing the problem it could be leaking either from the core it's self causing anti freeze to get into your vents or from one of the hoses leading to it.....I am assuming that when your heat is on there is a dampness in the air this is what is causing the windows to fog up.

Feb 17, 2014 | 2001 Dodge Durango

1 Answer

Fogging windows

Heater radiator leak.It is under the windscreen and can blow hot water (vapor) to the glass.Does it slightly smells heated water?Very rare:rain water in the saim compartment as the heater having the same simptoms.Track the problem,ceck coolant level regularly.Cheers,hope u deal it,let others know.

Oct 26, 2013 | Jeep Cars & Trucks

1 Answer

When I turn my heater and defroster on, a bad smell starts and the windows fog up but the air is hot.

This may be due to a bad heater core or dirty core with a plugged water drain, first see if the a/c works. turn it on and see if the air gets cold and if the ac compressor works.

The way the defrost works to keep windows from fogging up is that when the front defroster is tuned on the ac should also be on, on most cars when you go to defrost it will turn ac on automatic. the system then uses hot and cold air to remove the moisture in the air to avoid window fogging. if your a/c is not working then that may cause window to fog, but if you are also getting a smell then the drain that lets out condensation may be plugged and then water builds up and also mold from always being wet and when heat is on you smell that.

i want you to run the defrost and when windows fog up wipe window with hand and see if it is greasy . if it feels oily then you may have a bad heater core, the core leaks coolant out and steam and causing windows to fog up with a flim of grease.

Feb 03, 2013 | 2000 Chevrolet Silverado

1 Answer

Hi My side windows fogg up to the point i can't see anything. Now--- i do have a problem with climate control dash lites, I'm not sure if they are related. My defroster , and all the settings work ok,...

Lights would not be related but the fog is caused by dirty pollen filter, if you do not want to get an expensive resistor than it is easier to change much cheaper filter.

Dec 29, 2010 | 2006 Chrysler 300

1 Answer

My window foggs up when my defroster is on.

If the fog is slippery and not water vapor you may have a pin hole in your heater core. Try adding a stop leak to seal the heater core leak. If not, try pushing the AC button. On most foreign cars the AC compressor does not stay on long enough on defrost to clear the windows.

Jan 24, 2010 | 2000 Mitsubishi Galant

1 Answer

Why does windshield fog up when defroster is on on 1984 Olds 88

Your windshelid fogs up because of the cold air outside mixing with the warm air inside your car, causing the water vapor in the air to stick to your windsheild. Just turn down the heat a bit to solve the problem.

hope it works

Jan 11, 2010 | 1984 Oldsmobile Delta 88

1 Answer

AC/Defroster issue

On most vehicles the AC comes on when the defrost is on to keep AC compressor/clutch from seizing up from non use during winter months.

Aug 08, 2009 | 2007 Nissan Altima 3.5 Sedan

1 Answer

Headlamp assembly replacement for '97 honda civic

if it is fogg you can take a hair dryer and dry the fogg out.

Nov 18, 2008 | 1997 Honda Civic

Not finding what you are looking for?
2000 Jeep Grand Cherokee Logo

271 people viewed this question

Ask a Question

Usually answered in minutes!

Top Jeep Experts


Level 3 Expert

71694 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22082 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

7031 Answers

Are you a Jeep Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides